33 U.S.C. § 48 — Noxubee River, Mississippi

This section is a single, undivided provision about one specific river. It declares that part of the Noxubee River in Noxubee County, Mississippi, is a "nonnavigable stream" under the Constitution and laws of the United States. In practice, this means that this stretch of the river is not treated as a navigable waterway for federal law purposes — the federal government's usual authority over navigable waters does not apply to it in the way it would to a river Congress calls navigable. The section itself does not spell out every legal consequence of that label; it simply makes the declaration. The section also expressly reserves Congress's power to change its mind. Congress keeps the right to amend or repeal this section whenever it wants, and that right does not need to be granted again by any later law — it is built into this one from the start.